<template>
    <transition name="slide">
    <div class="city">
        <city-header></city-header>
        <city-search :cities="cities"></city-search>
        <city-list :cities="cities" :hotCities="hotCities" :letter="letter"></city-list>
        <!-- 监听alphabet向外出发的事件：@change="handleLetterChange，接收子组件传递的值-->
        <city-alphabet :cities="cities"  @change="handleLetterChange"></city-alphabet>
    </div>
    </transition>
</template>

<script>
import axios from 'axios'
import CityHeader from './components/Header'
import CitySearch from './components/Search'
import CityList from './components/List'
import CityAlphabet from './components/Alphabet'
export default {
    name: 'City',
    components: {
        CityHeader,
        CitySearch,
        CityList,
        CityAlphabet
    },
    data () {
        return {
            cities: {},
            hotCities: [],
            letter: ''
        }
    },
    methods: {
       getCityInfo () {
           axios.get('./api/city.json')
            .then(this.handleGetCityInfoSucc)
       },
       handleGetCityInfoSucc(res){
           //console.log(res)
           res = res.data
           if (res.ret && res.data) {
               const data = res.data
               this.cities = data.cities
               this.hotCities = data.hotCities
           }
       },
       handleLetterChange(letter){
           //console.log(letter);
           this.letter = letter
       }
    },
    mounted () {
        this.getCityInfo()
    }
}
</script>

<style lang="stylus" scoped>
    .city
        height 100%
    .slide-enter-active, .slide-leave-active
        transition all 0.3s
    .slide-enter, .slide-leave-to
        transform translate3d(100%, 0, 0)
</style>

